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GREENWICH AVENUE PSYCHIATRY, PC
NPI 1033819453
Psychiatry & Neurology - Child & Adolescent Psychiatry in Old Greenwich, CT

Active since March 06, 2023
3 W END AVE STE 111, OLD GREENWICH, CT 06870(917) 540-0230(917) 900-1602 Get Directions Write a Review

NPPES record last updated: June 4, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 4, 2025, Sep 1, 2023, Mar 6, 2023 (3 updates tracked since 2023).

About Greenwich Avenue Psychiatry, Pc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GREENWICH AVENUE PSYCHIATRY, PC (NPI 1033819453) is a healthcare organization registered as a child & adolescent psychiatry in Old Greenwich, Connecticut and active in the NPI registry since March 2023. The organization lists Marc Philip Halperin, President, as its authorized official.

NPPES Registry Identity

NPI1033819453
Entity TypeOrganization
Primary Taxonomy2084P0804X
Legal Business NameGREENWICH AVENUE PSYCHIATRY, PC
Location Address3 W END AVE STE 111Old Greenwich, CT 06870-1640
Mailing Address3 W End Ave Ste 111Old Greenwich, CT 06870-1640 · (917) 540-0230
Phone(917) 540-0230
Fax(917) 900-1602
Organization SubpartNo
Authorized OfficialMarc Philip HalperinPresident · (917) 540-0230
Enumeration DateMarch 6, 2023
Last NPPES UpdateJune 4, 20253 updates tracked since enumeration
NPPES CertifiedJune 4, 2025
✔ NPI 1033819453 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Child & Adolescent PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0804X
Definition
Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.
Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X
3 W END AVE STE 111, Old Greenwich, CT 06870
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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Greenwich Avenue Psychiatry, PC's NPI number?

The NPI number for Greenwich Avenue Psychiatry, PC is 1033819453. It was assigned to this organization in the NPPES registry on March 6, 2023.

Where is Greenwich Avenue Psychiatry, PC located?

Greenwich Avenue Psychiatry, PC is located at 3 W End Ave Ste 111, Old Greenwich, CT 06870. The listed phone number is (917) 540-0230.

What is Greenwich Avenue Psychiatry, PC's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

When was this NPI record last updated?

The NPPES record for Greenwich Avenue Psychiatry, PC was last updated on June 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.